WO2016047583A1

WO2016047583A1 - Rotation-transmitting device

Info

Publication number: WO2016047583A1
Application number: PCT/JP2015/076647
Authority: WO
Inventors: 慎太朗石川; 直嗣北山; 佐藤　光司; 齋藤　隆英
Original assignee: Ntn株式会社
Priority date: 2014-09-22
Filing date: 2015-09-18
Publication date: 2016-03-31
Also published as: JP2016061423A; JP6468773B2

Abstract

The present invention is a rotation-transmitting device equipped with: a bidirectional clutch (10), which has a control cage (16A) and a rotating cage (16B) and is configured to relatively rotate the two cages (16A, 16B) by moving said control cage (16A) in the axial direction and to engage and release rollers (15) incorporated between an outer ring (11) and an inner ring (13); and an electromagnetic clutch (50) for moving the control cage (16A) in the axial direction. The rotation-transmitting device is provided with a gap sensor (61) for detecting the axial direction position of the control cage (16A). The engagement or release of the bidirectional clutch (10) is detected from the axial direction position of the control cage (16A) and a detection signal is output from the gap sensor (61).

Description

Rotation transmission device

The present invention relates to a rotation transmission device used for switching between transmission and cutoff of rotation from an input shaft to an output shaft.

As a rotation transmission device for transmitting and interrupting rotation from an input shaft to an output shaft, a two-way clutch for coupling and releasing the input shaft and the output shaft is provided, and the engagement and release of the two-way clutch are electromagnetic clutches. What is controlled by this is conventionally known.

In the rotation transmission device described in Patent Document 1 below, control is performed between an outer ring provided at the shaft end of the output shaft and an inner ring provided at the shaft end of the input shaft and incorporated inside the outer ring. The cage and the rotary cage are assembled so that the pillar portions formed in each cage are alternately arranged in the circumferential direction, and a pair of opposed rollers are incorporated in the pockets formed between the adjacent pillar portions. A position where the pair of rollers is urged in a direction away from each other by an elastic member incorporated between the opposed portions, and is engaged with a cylindrical surface formed on the inner periphery of the outer ring and a cam surface formed on the outer periphery of the inner ring. The one ring is engaged with the cylindrical surface and the cam surface by the rotation of the inner ring in one direction, and the rotation of the inner ring is transmitted to the outer ring.

Also, an electromagnetic clutch is provided on the input shaft provided with the inner ring, and the control cage is moved in the axial direction by energizing the electromagnetic coil of the electromagnetic clutch, and the opposing surfaces of the flange of the control cage and the flange of the rotary cage The control cage and the rotary cage are rotated relative to each other so that the circumferential width of the pocket is reduced by the action of the torque cam provided between them, and the pair of rollers are moved to the disengagement position at the pillar portion of each cage. The rotation transmission from the inner ring to the outer ring is cut off.

JP 2012-149746 A

In the above rotation transmission device, nothing is described about detection of engagement and release of the two-way clutch. For this reason, when the rotation transmission device is used, it is impossible to know whether the two-way clutch is mechanically operating correctly.

Here, a rotation sensor is provided around the input shaft and the output shaft, and the rotation sensor detects the rotational speed difference between the input shaft and the output shaft, thereby confirming the operation of engaging and releasing the two-way clutch. However, since the rotation sensor is separated from the rotation transmission device, it is necessary to separately provide a sensor holder to support the rotation sensor. In this case, since it is necessary to support the rotation sensor with a predetermined interval between the input shaft and the output shaft, it is difficult to support the rotation sensor, and stable detection cannot be performed. Since it takes time for the shaft to rotate, it is impossible to instantly know the operation of the two-way clutch.

An object of the present invention is to provide a rotation transmission device capable of stably and instantaneously detecting an operation state of a two-way clutch.

In order to solve the above problems, in the present invention, a two-way clutch that transmits and blocks rotation between an input shaft and an output shaft, an electromagnetic clutch that controls engagement and release of the two-way clutch, A housing that covers the two-way clutch and the electromagnetic clutch, wherein the two-way clutch includes an inner circumference of the outer ring provided at the shaft end portion of the output shaft and an outer circumference of the inner ring provided at the shaft end portion of the input shaft. In between, a plurality of pillars provided on the flange of the control cage and a plurality of pillars provided on the flange of the rotary cage are assembled so as to be alternately arranged in the circumferential direction, and formed between adjacent pillars. A pair of engagement elements that can be engaged with the inner periphery of the outer ring and the outer periphery of the inner ring, and an elastic member that urges the pair of engagement elements in a direction away from each other. Electromagnetic An armature coupled to the control cage, a rotor facing the armature in the axial direction, an electromagnet facing the rotor in the axial direction, and attracting the armature to the rotor by energization, the electromagnet Provided with a motion conversion mechanism for converting the linear motion of the control cage that moves toward the rotor together with the armature by energization to the relative rotational motion in the direction in which the control cage and the rotary cage reduce the circumferential width of the pocket, In the rotation transmission device, when the energization of the electromagnet is released, the control retainer is moved to a position in contact with the opening end surface of the outer ring by the restoring elasticity of the elastic member so that the pair of engagement elements are in standby at the engagement position. Detecting the axial position of the control cage in the housing, and detecting the two-way clutch from the axial position. Engagement is had adopted a structure in which a detection sensor for detecting the release.

In the rotation transmission device configured as described above, the two-way clutch is disengaged by moving the control cage in the axial direction together with the armature by energizing the electromagnet. By detecting the position of the control cage in the axial direction with the provided detection sensor, engagement and release of the two-way clutch can be detected from the axial position.

Here, the detection sensor may be a gap sensor attached to a sensor mounting hole formed in the housing and operated by movement of a control holder or an armature connected to the control holder, or may be controlled with an outer ring. The pressure sensor may be a pressure sensor that is provided on the opposing surface in the axial direction of the cage or the opposing surface in the axial direction of the armature and the rotor and operates by loading with an axial force.

The gap sensor may be any of eddy current type, capacitance type, ultrasonic type and optical type. For the attachment of the gap sensor, it is possible to employ attachment by press fitting, attachment by tightening a nut, attachment by screwing, and attachment by adhesion or welding.

When the rotation transmission device is incorporated in a device such as steer-by-wire, the housing is fixed to a stationary member. Therefore, by providing a detection sensor in the housing, stable detection is possible and wiring work can be facilitated.

In the present invention, as described above, by providing the detection sensor for detecting the axial position of the control cage inside the housing, the operation state of the two-way clutch can be detected stably and instantaneously.

A longitudinal sectional view showing an embodiment of a rotation transmission device according to the present invention Sectional drawing which expands and shows the contact part of the outer ring | wheel of FIG. 1, and a control holder | retainer Sectional view showing armature adsorption state Sectional view along line IV-IV in FIG. Sectional drawing which expands and shows the engagement cancellation | release state of the roller in a two-way clutch Sectional view along line VI-VI in Fig. 1 Sectional view along line VII-VII in FIG. Sectional view along line VIII-VIII in FIG. Sectional view along line IX-IX in FIG. Sectional view showing the state before operation of the torque cam Sectional drawing which shows the other example of attachment of a detection sensor Sectional drawing which shows the further another example of attachment of a detection sensor Sectional drawing which shows the other example of the position detection of an armature Sectional view showing armature position detection by optical gap sensor Sectional drawing which shows the other example of the position detection of an armature Sectional view showing armature position detection by pressure sensor Sectional drawing which shows the other example of the position detection of the armature by a pressure sensor

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of a rotation transmission device according to the present invention. As shown in the figure, the rotation transmission device includes an input shaft 1, an output shaft 2 arranged coaxially with the input shaft 1, a housing 3 that covers the shaft ends of both shafts, and the housing 3. The two-way clutch 10 that transmits and shuts off the rotation from the input shaft 1 to the output shaft 2 and the electromagnetic clutch 50 that controls the engagement and release of the two-way clutch 10.

The housing 3 has a cylindrical shape, a small-diameter bearing cylinder 4 is provided at one end thereof, and the output shaft 2 is rotatably supported by a bearing 5 incorporated in the bearing cylinder 4.

As shown in FIGS. 1 and 4, the two-way clutch 10 is provided with a cylindrical surface 12 on the inner periphery of the outer ring 11 provided at the shaft end portion of the output shaft 2, and is provided at the shaft end portion of the input shaft 1. A plurality of cam surfaces 14 are formed at equal intervals in the circumferential direction on the outer periphery of the inner ring 13, and a pair of rollers 15 and an elastic member 20 as an engagement member are incorporated between each of the plurality of cam surfaces 14 and the cylindrical surface 12, The roller 15 is held by a cage 16, and the rotation of the inner ring 13 is transmitted to the outer ring 11 by engaging one of the pair of rollers 15 with the cylindrical surface 12 and the cam surface 14 by rotating the inner ring 13 in one direction. Further, when the inner ring 13 rotates in the other direction, the other roller 15 is engaged with the cylindrical surface 12 and the cam surface 14 to transmit the rotation of the inner ring 13 to the outer ring 11.

Here, a small-diameter concave portion 17 is formed on the inner surface side of the closed end portion of the outer ring 11, and the shaft end portion of the input shaft 1 is rotatably supported by a bearing 18 incorporated in the concave portion 17.

The inner ring 13 is formed integrally with the input shaft 1. The cam surface 14 formed on the outer periphery of the inner ring 13 is formed of a pair of

inclined surfaces

14 a and 14 b that are inclined in opposite directions, and has a wedge shape with narrow ends in the circumferential direction between the outer ring 11 and the cylindrical surface 12. A space is formed, and a flat surface 19 facing the tangential direction of the inner ring 13 is provided between the pair of

inclined surfaces

14 a and 14 b, and the elastic member 20 is supported by the flat surface 19.

The elastic member 20 is a coil spring. The elastic member 20 is incorporated between the pair of rollers 15, and the elastic member 20 biases the pair of rollers 15 away from each other, as shown in FIG. 14 is placed at a standby position where it engages with 14.

The holder 16 includes a control holder 16A and a rotary holder 16B. As shown in FIGS. 1 and 8, the control retainer 16 A is provided with the same number of column portions 22 as the cam surface 14 on the outer peripheral portion of one surface of the annular flange 21 at equal intervals in the circumferential direction, and between the adjacent column portions 22. An arc-shaped long hole 23 is formed on the outer periphery, and a cylindrical portion 24 is provided on the outer periphery in a direction opposite to the column portion 22.

On the other hand, as shown in FIG. 1, the rotation cage 16 B has a configuration in which the same number of column portions 26 as the cam surface 14 are provided at equal intervals in the circumferential direction on the outer periphery of the annular flange 25.

The control retainer 16A and the rotation retainer 16B are a combination in which the column portions 26 of the rotation retainer 16B are inserted into the elongated holes 23 of the control retainer 16A, and the

column portions

22 and 26 are alternately arranged in the circumferential direction. ing. In the combined state, the end portions of the

column portions

22 and 26 are disposed between the outer ring 11 and the inner ring 13, and the flange 21 of the control holder 16 A and the flange 25 of the rotary holder 16 B are fitted to the outer periphery of the input shaft 1. The support ring 28 and the outer ring 11 are integrated.

By incorporating the

cages

16A and 16B as described above, as shown in FIG. 4, a pocket 27 is formed between the column portion 22 of the control cage 16A and the column portion 26 of the rotary cage 16B. A pair of opposed rollers 15 and an elastic member 20 are incorporated in each pocket 27 so as to face the 13 cam surfaces 14 in the radial direction.

As shown in FIG. 1, the flange 21 of the control holder 16A is slidably supported along a slide guide surface 29 formed on the outer periphery of the input shaft 1, and is mounted on the flange 25 and the input shaft 1 of the rotary holder 16B. A thrust bearing 30 is incorporated between the above-described support rings 28 fitted.

The thrust bearing 30 rotatably supports the rotary cage 16B in a state that prevents the rotary cage 16B from moving to the electromagnetic clutch 50 side.

As shown in FIGS. 1 and 8, between the flange 21 of the control holder 16A and the flange 25 of the rotary holder 16B, the linear movement of the control holder 16A in the axial direction is controlled between the control holder 16A and the rotary holder 16B. A torque cam 40 is provided as a motion converting mechanism that converts the relative rotational motion of the motor.

As shown in FIGS. 9A and 9B, the torque cam 40 has a pair of opposing cams that gradually become shallower toward the opposite ends of the flange 21 in the control retainer 16A and the flange 25 in the rotation retainer 16B at the center in the circumferential direction. The

cam grooves

41 and 42 are provided, and a ball 43 is incorporated between the pair of

opposed cam grooves

41 and 42.

Here, the cam groove 41 is formed by a pair of inclined cam surfaces 41a and 41b inclined in opposite directions and has a V-shaped cross section. On the other hand, like the cam groove 41, the cam groove 42 is formed by a pair of inclined cam surfaces 42a and 42b and has a V-shaped cross section.

When the control holder 16A moves in the axial direction in a direction in which the flange 21 of the control holder 16A approaches the flange 25 of the rotary holder 16B, as shown in FIG. It rolls and moves toward the deepest position of the

groove depths

41 and 42, and the control holder 16A and the rotary holder 16B are relatively rotated in the direction in which the circumferential width of the pocket 27 is reduced.

When the pair of rollers 15 are moved away from each other by the elastic force of the elastic member 20, the control holder 16A moves toward the outer ring 11 while rotating by the operation of the torque torque cam 40.

As shown in FIG. 7, a cylindrical holder fitting surface 44 having a diameter larger than that of the slide guide surface 29 is formed at the intersection of the axial end of the inner ring 13 and the slide guide surface 29. A spring holder 45 is fitted to the mating surface 44.

The spring holder 45 is prevented from rotating with respect to the holder fitting surface 44 and is non-movably supported in the axial direction. As shown in FIG. A plurality of detent pieces 46 are formed between the column portions 26 of the rotation cage 16B.

When the control retainer 16A and the rotation retainer 16B rotate relative to each other in a direction that reduces the circumferential width of the pocket 27, the plurality of detent pieces 46 are connected to the column portion 22 of the control retainer 16A and the rotation retainer 16B. The column portion 26 is received at both side edges to hold the pair of opposed rollers 15 in a neutral position.

As shown in FIG. 7, a spring holding piece 47 is provided on the outer peripheral portion of the spring holder 45 so as to project to the outer diameter side of each of the plurality of elastic members 20, and the elastic member 20 is attached to the pair of rollers 15 by the spring holding pieces 47. Escape to the outer diameter side from the gap is prevented.

As shown in FIG. 1, the electromagnetic clutch 50 includes an armature 51 that faces the end face of the cylindrical portion 24 formed in the control retainer 16A in the axial direction, a rotor 52 that faces the armature 51 in the axial direction, and the rotor 52 and an electromagnet 53 facing in the axial direction.

The armature 51 is fitted to the outer periphery of the support ring 28 and is rotatably and slidably supported. The cylindrical portion of the control retainer 16A is formed on the inner diameter surface of the connecting cylinder 55 provided on the outer peripheral portion of the armature 51. The control holder 16A and the armature 51 are connected and integrated by press-fitting 24. With this connection, the armature 51 is slidably supported at two locations in the axial direction of the cylindrical outer diameter surface 54 of the support ring 28 and the slide guide surface 29 on the outer periphery of the input shaft 1.

Here, the support ring 28 is positioned in the axial direction by a step portion 31 formed on the other side in the axial direction of the slide guide surface 29 of the input shaft 1.

The rotor 52 is press-fitted into the input shaft 1 and is positioned in the axial direction by a shim 56 incorporated between the rotor 52 and the support ring 28.

The electromagnet 53 includes an electromagnetic coil 53a and a core 53b that supports the electromagnetic coil 53a. The core 53 b is fitted in the other end opening of the housing 3 and is prevented from being pulled out by a retaining ring 6 attached in the other end opening of the housing 3. The core 53 b is rotatable relative to the input shaft 1 via a bearing 57 fitted to the input shaft 1.

In the rotation transmission device having the above-described structure, when the energization of the electromagnetic coil 53a of the electromagnetic clutch 50 shown in FIG. 1 is interrupted, the roller 15 of the two-way clutch 10 is, as shown in FIG. Is in a standby state in which a minute gap is formed.

Therefore, when the input shaft 1 rotates in one direction, the inner ring 13 rotates relative to the pair of rollers 15 so that one of the opposed pair of rollers 15 is engaged, and the rotation of the input shaft 1 causes the one roller 15 to rotate. The output shaft 2 rotates in the same direction as the input shaft 1. When the input shaft 1 rotates in the reverse direction, the other roller 15 is engaged and the rotation of the input shaft 1 is transmitted to the output shaft 2 via the other roller 15.

When the electromagnetic coil 53a of the electromagnetic clutch 50 is energized while the two-way clutch 10 is engaged, an attractive force acts on the armature 51, and the armature 51 moves in the axial direction and is attracted to the rotor 52.

At this time, since the armature 51 and the control holder 16A are connected and integrated by fitting the connecting cylinder 55 and the cylinder portion 24, the control holder 16A moves along with the movement of the armature 51 in the axial direction. The flange 21 moves in a direction approaching the flange 25 of the rotary cage 16B.

By the relative movement of the control holder 16A and the rotary holder 16B, the ball 43 shown in FIG. 9A rolls and moves to the deepest position of the

cam grooves

41 and 42 as shown in FIG. 9B. The cage 16A and the rotary cage 16B rotate relative to each other in the direction in which the circumferential width of the pocket 27 decreases.

Due to the relative rotation of the control holder 16A and the rotary holder 16B, the pair of opposed rollers 15 shown in FIG. 4 are pushed by the column portion 22 of the control holder 16A and the column portion 26 of the rotary holder 16B so as to approach each other. Moving.

Therefore, as shown in FIG. 5, the roller 15 is displaced to a neutral position where the engagement with the cylindrical surface 12 and the cam surface 14 is released, and the two-way clutch 10 is disengaged.

When the rotational torque is input to the input shaft 1 and the input shaft 1 is rotated in one direction in the disengaged state of the two-way clutch 10, the rotor 52 press-fitted into the input shaft 1 also rotates in the same manner. The armature 51 adsorbed by the armature 51 and the control holder 16A connected to the armature 51 also rotate, and the rotation holder 16B also rotates through the torque cam 40. At this time, since the pair of opposed rollers 15 is held in the neutral position where the engagement is released, the rotation of the input shaft 1 is not transmitted to the outer ring 11 and the input shaft 1 rotates freely.

Here, when the control retainer 16A and the rotation retainer 16B are relatively rotated in the direction in which the circumferential width of the pocket 27 is reduced, either the column 22 of the control retainer 16A or the column 26 of the rotation retainer 16B is Abutting on the edge of the rotation stopper piece 46 of the spring holder 45, the rotation direction is restricted, and the other is relatively rotated in the direction of further reducing the circumferential width of the pocket 27. The other rotates through the torque cam 40 by the amount moved in the axial direction until the rotor 52 and the armature 51 come into contact with each other, and finally rotates to a substantially neutral state.

For this reason, the elastic member 20 will not shrink more than necessary, and even if it is repeatedly expanded and contracted, it will not be damaged by fatigue.

When the energization of the electromagnetic coil 53a is released in the free rotation state of the input shaft 1, the armature 51 is released from the adsorption and becomes rotatable. By releasing the suction, the pair of opposed rollers 15 are moved away from each other by the pressing of the elastic member 20, and the control holder 16A and the rotary holder 16B are relatively rotated in the direction in which the circumferential width of the pocket 27 is increased. The control cage 16 A moves to the outer ring 11 side by the action of the torque cam 40 and comes into contact with the opening end surface of the outer ring 11.

Further, as shown in FIG. 4, each of the pair of opposed rollers 15 is disposed at a standby position where a minute gap is formed between the cylindrical surface 12 and the cam surface 14. One of the rollers 15 immediately engages with the cylindrical surface 12 of the outer ring 11 and the cam surface 14 of the inner ring 13, and the rotation of the input shaft 1 is transmitted to the output shaft 2.

Here, when the input shaft 1 is stopped and the rotation direction of the input shaft 1 is switched, the rotation of the input shaft 1 is transmitted to the output shaft 2 via the other roller 15.

As described above, when the energization of the electromagnetic coil 53a is interrupted, the control holder 16A and the rotary holder 16B rotate relative to each other in the direction in which the circumferential width of the pocket 27 increases, and each of the pair of opposed rollers 15 has the cylindrical surface 12. In addition, since a small gap is formed between the cam surface 14 and the cam surface 14 immediately enters the standby state, the play in the rotational direction is small, and the rotation of the inner ring 13 can be immediately transmitted to the outer ring 11.

Also, since the rotational torque is transmitted from the input shaft 1 to the output shaft 2 through the same number of rollers 15 as the cam surface 14, a large rotational torque can be transmitted from the input shaft 1 to the output shaft 2.

When the control retainer 16A and the rotation retainer 16B are relatively rotated in the direction in which the circumferential width of the pocket 27 is increased, the ball 43 rolls and moves toward the shallow groove portion of the pair of

opposed cam grooves

41 and 42. It will be in the state shown to 9A.

As described above, the two-way clutch 10 is engaged when the electromagnetic clutch 50 is turned off by releasing the energization of the electromagnet 53, and the two-way clutch 10 is released when the electromagnetic clutch 50 is turned on by supplying the electromagnet 53. It is extremely effective for applications that require a fail-safe mechanism.

The rotation transmission device having the above configuration is used for, for example, a steer-by-wire of a vehicle. At this time, before the rotation transmission device is rotated, it is necessary to mechanically detect the operating state of the two-way clutch 10 in order to inform the driver whether or not the fail-safe mechanism is operating.

Therefore, in the embodiment, as shown in FIGS. 1 and 2, a sensor mounting hole 60 is provided in the housing 3, and a gap sensor 61 as a detection sensor is press-fitted into the sensor mounting hole 60 and controlled by the gap sensor 61. The position of the cage 16A is detected, and the engagement and release of the two-way clutch 10 are detected from the position detection.

FIG. 2 shows a state in which the armature 51 is desorbed, and the flange 21 of the control holder 16A connected to the armature 51 abuts against the opening end surface of the outer ring 11, and the roller 15 of the two-way clutch 10 is shown in FIG. As shown, it is located in the engaged position and the two-way clutch 10 is in the engaged state. The gap sensor 61 is provided at a position facing the outer periphery of the flange 21 of the control holder 16A, and outputs a detection signal indicating that the two-way clutch 10 is engaged from the axial position of the control holder 16A.

In the state shown in FIG. 2, when the armature 51 and the control retainer 16A are moved toward the rotor 52 by energizing the electromagnetic coil 53a and the two-way clutch 10 is switched to the disengaged state, as shown in FIG. In addition, a gap is formed between the opening end face of the outer ring 11 and the flange 21 of the control holder 16A, and the gap sensor 61 detects that the control holder 16A has moved to the rotor 52 side, and the control holder A detection signal indicating that the two-way clutch 10 is disengaged is output from the axial position of 16A.

Thus, by detecting the axial position of the control holder 16A by the gap sensor 61, it is possible to detect the engagement and release of the two-way clutch 10, and the operation state of the two-way clutch 10 can be instantaneously detected stably. Can be detected.

Here, the gap sensor 61 may be any of an eddy current type, a capacitance type, an ultrasonic type, and an optical type. When the gap sensor 61 is attached, in FIG. 2, it is assumed that the gap sensor 61 is attached by press-fitting. However, the present invention is not limited to this.

10 and 11 show another example of attachment of the gap sensor 61. FIG. In FIG. 10, a nut 62 is embedded in an inner end portion of a sensor mounting hole 60 formed in the housing 3, and a male screw 61 a provided on the outer periphery of the gap sensor 61 is screw-engaged with the nut 62. A gap sensor 61 is fixed by screwing a lock nut 63 to an end portion of the housing 61 located outside the housing 3.

In FIG. 11, a gap sensor 61 is fitted into a sensor mounting hole 60 formed in the housing 3 and welded to the housing 3. Reference numeral 64 denotes a welded portion. In place of welding, bonding may be performed.

In FIG. 3, the axial position of the control retainer 16A is detected by the gap sensor 61 and the engagement / release of the two-way clutch 10 is detected from the axial position. However, as shown in FIG. Further, a gap sensor 61 may be provided at a position facing the facing surface of the rotor 52 in the axial direction, and the engagement and release of the two-way clutch 10 may be detected from the position of the armature 51 in the axial direction. In FIG. 12, since a gap is formed between the opposed portions of the rotor 52 and the armature 51, the gap sensor 61 outputs a detection signal indicating that the two-way clutch 10 is engaged.

As shown in FIG. 13, a gap sensor 61 is provided at each of a position facing the facing surface of the outer ring 11 and the control retainer 16A and a position facing the facing surface of the armature 51 and the rotor 52 in the axial direction, thereby controlling the retainer 16A. The engagement and release of the two-way clutch 10 may be detected from the axial position of the armature 51 and the axial position of the armature 51. In FIG. 13, an optical sensor is used as the gap sensor 61.

As shown in FIGS. 2, 12, and 13, by providing the gap sensor 61 in the housing 3 fixed to the stationary member, stable detection can be performed, and wiring work can be facilitated.

2, FIG. 12 and FIG. 13 employ a gap sensor as the detection sensor 61, but the detection sensor 61 is not limited to a gap sensor.

FIG. 14 employs a pressure sensor as the detection sensor 61 to detect engagement and release of the two-way clutch 10. That is, the pressure sensor 61 is embedded in the opening end face of the outer ring 11 facing the control holder 16A, and when the two-way clutch 10 is in contact with the opening end face of the outer ring 11, the control holder 16A The pressure sensor 61 is operated by an axial force applied to the pressure sensor 61. The pressure sensor 61 outputs a signal indicating that the two-way clutch 10 is engaged when an axial force is applied.

In FIG. 14, the pressure sensor 61 is provided on the outer ring 11. However, as shown in FIG. 15, the pressure sensor 61 is provided on the outer peripheral portion of the surface of the control retainer 16A facing the outer ring 11 of the flange 21. Also good.

In addition, as shown in FIG. 16, a concave step portion 65 is provided on the outer peripheral portion of the surface of the armature 51 that faces the rotor 52, and the annular step portion 65 has an annular shape that cushions the impact force when contacting the rotor 52. A buffer member 65 is slidably mounted, a pressure sensor 61 is provided between the end surfaces of the buffer member 65 and the concave step portion 65, and an axial force is applied to the pressure sensor 61 when the armature 51 is attracted to operate the pressure sensor 61. You may make it make it. In FIG. 16, when an axial force is applied, the pressure sensor 61 outputs a signal indicating that the two-way clutch 10 is in a disengaged state.

As shown in FIG. 14, FIG. 15 and FIG. 16, the wiring when the pressure sensor 61 is provided in the outer ring 11, which is a rotating member, and the control retainer 16A to the armature 51 sends a stable signal by using a slip ring. Can do.

1 Input shaft 2 Output shaft 10 Two-way clutch 11 Outer ring 13 Inner ring 15 Roller (engagement element)

16A Control cage

16B Rotating cage 20 Elastic member 21 Flange 22 Column portion 25 Flange 26 Column portion 40 Torque cam (motion conversion mechanism)
50 Electromagnetic clutch 51 Armature 52 Rotor 53 Electromagnet 61 Detection sensor (gap sensor, pressure sensor)

Claims

A two-way clutch that transmits and blocks rotation between the input shaft and the output shaft; an electromagnetic clutch that controls engagement and release of the two-way clutch; and a housing that covers the two-way clutch and the electromagnetic clutch. And
A plurality of two-way clutches are provided on the flange of the control cage between the inner periphery of the outer ring provided at the shaft end of the output shaft and the outer periphery of the inner ring provided at the shaft end of the input shaft. A plurality of pillar portions provided on the pillar portion and the flange of the rotary cage are assembled so that they are alternately arranged in the circumferential direction, and the inner ring of the outer ring and the outer periphery of the inner ring are placed in pockets formed between adjacent pillar portions. A pair of engagement elements that can be engaged with each other, and an elastic member that urges the pair of engagement elements in a direction away from each other;
The electromagnetic clutch comprises an armature connected to the control retainer, a rotor facing the armature in the axial direction, an electromagnet facing the rotor in the axial direction, and attracting the armature to the rotor by energization,
A motion conversion mechanism for converting linear motion of the control cage that moves toward the rotor together with the armature by energizing the electromagnet into relative rotational motion in a direction in which the control cage and the rotary cage reduce the circumferential width of the pocket; Provided,
In the rotation transmission device, when the energization of the electromagnet is released, the control retainer is moved to a position in contact with the opening end surface of the outer ring by the restoring elasticity of the elastic member so that the pair of engagement elements are in standby at the engagement position. ,
A rotation transmission device characterized in that a detection sensor for detecting an axial position of the control cage in the housing and detecting engagement and release of the two-way clutch from the axial position is provided.
The rotation transmission device according to claim 1, wherein the detection sensor includes a gap sensor that is attached to a sensor attachment hole formed in the housing and operates by movement of the control holder or the armature.
The rotation transmission device according to claim 2, wherein the gap sensor is one of an eddy current type, a capacitance type, an ultrasonic type, and an optical type.
The rotation transmission device according to claim 2, wherein the attachment of the detection sensor is one of press fitting, nut tightening, screwing, adhesion or welding.
The said detection sensor consists of a pressure sensor which is provided in the opposing surface of the axial direction of the said outer ring | wheel and a control holder, or the opposing surface of the axial direction of the said armature and a rotor, and operate | moves by the load of axial force. Rotation transmission device.